Carbureter.



J. NAMUR.

UARBURETER. APPLICATION FILED we. 128, i911 Patented Apr. 2, 191.2.

AUUHMEYS' Z '0 all whom it may concern.

UNITED saws tA'lElv'lf OFFICE.

JOSEPH NAMUR, or

KINSLEY, KANSAS, r

cameraman.

1 022 326 Specification ofLetters fatent Apr.2,

Application filed Aixgnst 28, 1911. Serial 170. 646,517.

Be it known that I, Josnrn Na um-a citizen of the United States, and a resident of Kinsleyg in the county of Edwards and State of Kansas, hJ- einvented certain improvements in Carbureters, of which the following is a specification.

My invention is an improvement in the class of air carbnrcters having an a'ir-inlet valve adapted toopen automatically, more or less, according to the variation of pressure in the mixing chamber corresponding uniformly to the, work'required of the engine. I

The invention is embodied. in a. new and improved construction and arrangement of parts for controlling admission of air and the ignitible' vapor, so' that the proportions of the two always bear a certain ratio;

My invention consists, further, in certain details of construction and combination and! arrangement of parts as will be hereinafter described, and illustrated in the accompanyingdrawing in which Figure 1 is in part a rear VltW, and in part a vertical section of the 'earbureter on the. line 11 of Fig. 2. Fig. 2 is a vertical section on the line 22- of Fig. 1. Fig. 3 is a perspective view of. the bell crank which operatively connects the air inlet valves with the needle valve controlling admission of the combustible liquid. Fig. at is a perspective view of a rear upperportion of the ca'rhureter.

The hollow body of the carbureterhas a lower chamber 1 for receiving and holding gasolenc. or other equivalent hydrocarbon liquid, which is kept at a constant level.

The upper part of the carbnreterbody has "two vertical air chambers 2 arrangml side by side which are provided, respectively, with large and small ducts and 3--sec Fig. 1-that in turn comnnmicate with the outlet passage 4 in which a butterfly throttle valve 5 is arranged.

As shown in Fig. l. the two air chambers are provided, respectively, with large and small inlets or openings 6 and 7 which are normally closed by valves 8 and 9 correspond ing in size. The valves are applied and seatoutwardly. as shown in Fig. 2. To the backs of the valves are riveted rigid arms 10 and 11 having at their upper ends hollow bearings 12 and 13 which are prr pvided respectively with laterally projecting arms 14 and 15. These bearings are mounted upon axes lfi andarejthpsadapted'toroclt as the valves open andclos'e. -The valves are, held normallyclosed by platesprings IT and attached at their lowerjendsto. the body of the carburetor and arranged ver- 18 that are tically with their free ends bearing against valves. It. will be noted that the, springs differ in .size andst'rength' corresponding to the difference of size between the respective air inlets and valves.

sage 4 which ingchamber.

The needle. valve'f l9fpas'ses also through the side of one ofthe air chamber s. A

the air-inlet valves 8 and 9am operatively connected, will. nowbe described. An L- shaped or elbow lever 24: ?18 pivoted to the carbureter at 25, its horizontal arm having '23 bears. as, will be readily understood. To the upper or vertical arm of thelever 24 there is pivoted a 'cruciformpiece 27whose horizontal. arms are provided with split bosses 28 through lwhich rods 29, bent at a right angle as-shown in Fig. 2. areinserted. Screws 2,0 serve to clamp the bosses and th as to hiild l'licf-ilodsfifl ,adjustably. The bent ends of the rods'bear against short 10 and H. In view of the function of these rmls they mayl: be conveniently termed fingers. Tt is apparent that the sprinf-QQ on the needle valve 19 exerts a constantdmrnwartl press'm-e on the valve and on the horizontal. arm oflthe lever 24 so that the. fingers 29 are held pressed against the lever exten ions 31 of the valves 10 and 11.

rest and the throttle 5 closed, both air valves thelateral arms 14 and 15 ofthe respective A needle valve'l9lis seated in a. nozzle 20 and thus controls admission of the. ignit-. ible liquid from chamber 1 into .theair duct 3* from which it passes intothe' outlet pas- I practically constitutes. a inix through the topofthe carburetor and a bracket 21 that is ifix'ed to spiral spring 22 encircles 1 the'npp'eg. portion j of the needle valve and .isarranged between.

- The means whereby the needle-valve and an enlarged head 26 through whichthe f needle valve passes and upon which the nut extensions- 3] of the'air inlet valve shanks It is apparent that when the engine is at 8 and 9 and also the needle valve 19 will be also closed; but upon opening the throttle slightly and (bus starting the engine, the smaller air valve 9 having the weaker spring 18 will open first or correspondingly and thereby the needle valve will be also raised or opened in a corresponding degree. In other words, the two valves 19 and 9 will open simultaneously and correspondingly. Then, upon opening the throttle still further,'the valve 9 W111 open and the needle valve also still further until a certain .limit is reached, when, the throttle being still further opened, the auxiliary or large valve 8 will begin to open also and at the same time the needle valve will be opened further and in the same proportion, thus admitting more of the ignit ble liquid and-more of the air u to the full capacity of the engine. It

will e seen'that by the relative adjustment of the fingers 29, it is possible to make any desired variation in the proportions of air and as or vapor. In other words, by mov- .ing't e fingers-downward, less gas or vapor willbe-admitted and therefore a weak m 1x --ture of air and vapor will result; but by adjusting the fingers 29 upward, the needle valve is left free to open wider and consequently more gas or vapor is admitted and a richer-mixture is formed. The springs 17 and 18 bearing on the lateral-arms 14 and 1,5 of the air valves have a tension just suflicient to produce the vacuum required to raise the -gasolene through the nozzle 20 and thus the carbureter does not depend upon an excessive or strong vacuum to make a correct mixture of gas and air, since the needle valve automatically regulates the admission of the ga according to the power it is desired to attain from the engine.

It is to be understood that in practice a float and connected mechanism will be employed for maintaining the practically c'onstant level of the hydrocarbon liquid in the chamber of the carbureter. Since this is a common feature in carbureters of this-"class, it is not deemed necessary to illustrate nor to describe it in detail.

What I claim is 1. The improved carbureter having two air chambersprovided with air inlets and valves difilering in size, a needle valve controlling the admission of ignitible fluid to the mixing chamber, and means connecting the air valves and needle valve, whereby both'are adapted to open simultaneously and correspondingly, substantially as described. 2. The improved carbureter having two air chambers provided with air inlets difiering in size, difi'erential valves for such inlets and differential springs holding the valves normally closed, a needle valve controlling the admission of the ignitible fluid, a pivotedlever, one end of which is connected with the needle valve, a spring applied to said valve and pressing upon the lever, and means for operatively connecting the upper end of the lever with the air valves, whereby when the latter are opened,

the needle valve is simultaneously opened,

substantially as described.

3. The improved carbureter comprising a hollow body having two air chambers provided with difi'erential openings foradmission of air, differential valves applied to such openings and having their fulcrums provided, with lateral arms, differential springs bearing upon said arms and holding the valves normally closed, a needle valve and a spring applied thereto, a pivoted elbow lever upon which the spring is adapted to bear, and means connected with the upper arm of the lever for hearing on the extended shank; of. the air inlet valves, substantially as described.

4. The improved carbureter comprising a hollow body and two air chambers having differential air openings, differential valves normally closing such openings and springs tending to hold the same normally closed, a needle valve controlling admission of the ignitible fluid to the mixing chamber, a

spring applied to such valve, and a pivoted lever upon one end of which the spring bears, its upper portion being provided with vertically adjust-able fingers bearing against extensions of the shanks of the inlet valves, substantially as described.

The improved carbureter comprising a hollow body provided with air chambers having differential openings and corresponding valves for closing the same, differential springs for holding such valves normally closed, a needle valve controlling admission of the ignitible fluid, a spiral spring applied to the same, an elbow lever with whose horizontal arm the needle valve is operatively connected, its upper arm having a pivoted cruciform piece provided with lateral ex-' tensions, and fingers which are vertically adjustable in said piece and adapted to bear upon lever extensions of the air inlet valve shanks, all operating substantially as de-- scribed.

JOSEPH NAMUR Witnesses:

A. W. KING, FRED A. BIEBER. 

